Prepared by UNODC staff and/or external experts, the series of monographs called "UNODC Studies on Drugs and Crime" focuses each issue on a specific topic to present new findings, introduce background information on a debated subject or review the status of knowledge on a given topic.
Source for download: http://www.unodc.org/documents/data-and-analysis/Studies/Global_Afghan_Opium_Trade_2011-web.pdf
